Simple Machines. SOL 3.2. Machine – a tool that helps us do work. Machines help us by: Changing the amount of force on an object. Changing the direction of the force. Force is a push or pull that changes the motion or shape of an object. Example: I push a bookshelf to move it.
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Machines help us by:
Example: I push a bookshelf to move it.
Example: I must have energy to run the mile.
Example – Picking up something heavy is hard work!
Gravity is the force that constantly pulls objects toward Earth.
Example: seesaw, crowbar, baseball bat, rake
Example: ramp, stairs
Example: knife, door wedge, ax
Example: drill bit, screws
Example: steering wheel, doorknob, screwdriver
Example : flagpole, clothesline, cranes, fishing reel
Energy Force Function
Work is done!